Flyer spindle for two-for-one twisting machine

ABSTRACT

THE INVENTION PROVIDES A FLYER SPINDLE FOR A TWO-FOR-ONE TWISTING MACHINE WHEREIN THE TENSION ON THE YARNS BEING DRAWN OFF FOR TWISTING IS SELF REGULATED BY MEANS OF A MECHANISM INCLUDING A TENSIONING ROLLER.

FLYER SPINDLE FOR TWO-FOR-ONE TWIS'IING MACHINE Filed June 24, 1969 G.G. COSTA Oct. 19, 1971 2 Sheets-Sheet l FLYER SPINDLE FOR TWO-FOR-ONETWISTING MACHINE Filed June 24, 1969 G. G- COSTA Oct. 19., 1971 2Sheets-Sheet 2 FIG.2

INVEN'IOR. 5.4 (057-4 United States Patent Int. Cl. D01h 7/86 US. Cl.5758.86 4 Claims ABSTRACT OF THE DISCLOSURE The invention provides atflyer spindle for a two-for-one twisting machine wherein the tension onthe yarns being drawnoff for twisting is self regulated by means of amechanism including a tensioning roller.

The object of the present invention is to provide a creel pin or fiyerspindle for a double-twist flyer frame, so constructed, that by virtueof the arrangement and nature of its component parts, it affords bycomparison with fiyer spindles as hitherto used, amongst others, thefollowing advantages: when drawing the threads or doubled yarns from thecop without twisting them throughout their length until they reach thedraw-0E gear, they are held at a uniform tension; it is possible to usethe arrangement with a horizontal carriage, together with the draw-offand pick-up gear; the bowls are so constructed and operated as to run atspeeds of 2000-6000 r.p.m., depending on the kind of yarn being handled,corresponding to 4000-12,000 r.p.m. of the yarn in a double-twist frame,such speeds being attained with a large cop; complicated reelingarrangements in the creel can be dispensed with, for reversing orunwinding the spool when large cops of doubled yarns are being handled,while being able to arrange for (simultaneous) twisting on 3 to 4spindles, thus being able to combine 3-4 twisted yarns into a singlethread. All these advantages are obtained at speeds which have hithertobeen considered impossible with such cops.

The particular feature of the flyer spindle in accordance with thepresent invention consists in that a rocking frame carries, in twosupports or bearings, the elements holding the cop carrying the yarn tobe twisted, comprising rotating spindles one of which is fixed, and theother longitudinally adjustable in order to adjust to the cop to beused; such a frame being fitted between two, horizontally-opposite hubsor end shields carried on axial bearings in oppositely facing supports,suitably in combination with a series of jockey rollers guiding the yarnto be twisted, which is thereby guided outside the said hub caps, overfurther tensioning rollers connected with a tensioning gear associatedwith a thread-tension meter and a compensating brake in such manner thatif and when the thread tension becomes irregular, the cop (spool) isbraked by acting on the adjustable spindle on which it is attached, sothat the thread being unwound is always under the same reeling tension.

The characteristic features and advantages of a creel pin or flyerspindle in accordance with the present invention will be clearlyapparent from the description now following under reference to theaccompanying drawing representing an exemplary form of embodimentthereof.

FIG. 1 is a longitudinal section of a creel spindle in accordance withthe present invention;

FIG. 2 is a cross-sectional elevation on a larger scale, along the lineI IIHI of FIG. 1.

The flyer spindle according to the present invention ice consists of arocking frame .1 fitted externally with a series of battens 2,reciprocally parallel and enclosing supports respectively carrying thebearing blocks 3 and 4 fitted on the cop spool 5, whereof 3 carries aball-bearing 6 for a rotating, horizontal spindle 7 fitting into one endof the central bore of the spool, while the bearing block 4 carries abearing 8 enclosing a rotating, threaded spindle 9 passing through the.bowl element 10 into which it is screwed and fitted into the other endof the bore of the cop spool; said threaded spindle 9, for ease ofadjustment, is movable longitudinally in either direction by screwing inor out of the aforesaid bowl 10, and is rotated by a fixed pulley orsheaive 11, actuated by a belt drive (not shown in the drawing) throughthe intermediary of pulleys (rollers) 12, controlled by a hysteresisbrake 13, the purpose of which will be explained presently. The housing1 is held between the end shields, bowls, or end cones 14 and =15,carried on the spindles 16 and 17 respectively, with jockey guidepulleys or rollers 18, 19, 20, 21, 22, 23, 24 and 25, 26, fitted atsuitable points, which guide the yarn 27 between the cop 5 from which itis drawn, and the draw-off gear; one of these pulleys 21 being atensioning roller forming part of a tensometer device also incorporatinga lever 28 (see FIG. 2) influencing a measuring device 29 linked withthe hysteresis brake 13 acting on the combined pulleys 12 and 11associated with the aforementioned belt drive, and thus controlling therotation of the spindle 9, driving the cop spool 5 and thus ensuringthat the latter, while the yarn is running oif, is maintained at aconstant tension. Note that the movable pulley 21 is shown in twopositions in FIGS. '1 and 2 The manner of action of the arrangement isas follows:

(1) The cop spool 5, fully charged with single or doubled yarns, e.g.coming from a Strader machine (in which the yarn has been spun), or anyother machine supplying an untwisted, double yarn, is inserted thereinand fixed in place by the holding spindles 7 and 9, for which purposethe spindle 9, previously screwed into the cupped element 10, is screwedback until it forces the spool to make contact with the other, fixedspindle 7.

(2) The yarn is run out by drawing the rod 30' on the creel bodycarrying the spool bearings 3 and 4, out wards until the turn of theyarn passing round the battens 2 reaches the jockey rollers 18, 19 and20.

(3) Next, the yarn is passed around the tensioning roller 21 and overthe roller 22 to the roller 23, thence over the outside of the bowls 15,14 to the rollers 24', 25 and 26, through the spindle 16, in thedirection of the draw-off mechanism, changing the passes to obtain theturns necessary for rotating the bowls 14, 15, which apply the doubletwist, while the housing 1 merely rocks or swings.

When the assembly is started the yarn drawn off by the appropriatemechanism, while running forward, is laid up with a double twist,running steadily oif the cop 5, and in the event of an irregular pullbeing exerted on the thread, the latter, in passing over the tensioningroller 21, influences the lever 28 operating the tensometer instrument29, which in turn applies the hysteresis brake 13 with which it islinked, and through the belt pulley 12 brakes the pulley 11 on thespindle 9 driving the cop 5, thus regulating the thread tension.

It should be understood that while retaining the essential features ofthe arrangement it is possible to modify individual components andelements or introduce equivalent means, e.g. the spool-holding elements,the tensometer gear and breaking means, the latter being of thehysteresis type, hydraulic, magnetic or of other, suitable form,according to the circumstances of the individual case.

I claim:

1. A fiyer spindle for a double-twist flyer comprising a rocking frameor housing containing a first and second bearing means for holding ayarn spool, said first bearing means carrying a spindle to attach to oneend of a yarn spool, said second bearing means carrying a spindle whichincludes a driving pulley therefor, belt control means extending about aportion of said driving pulley, a pair of end bowls positioned adjacentopposite ends of the rocking frame, bearing means rotatably supportingsaid pair of end bowls, a system of jockey rollers for guiding the yarnto be twisted from the yarn spool to the outside of said bowls, saidsystem of jockey rolls including a tension roll within the space betweensaid end bowls having an axle which is movable at right angles to theaxis thereof, in proportion to tension applied by the yarn passing oversaid roll, a tensometer instrument adjacent said tension roll, meanscoordinating the tensometer with the position of the tension roll, andmeans connecting the output of said tensometer to said belt controlmeans for said second spindle.

2. The flyer spindle as claimed in claim 1, wherein said belt controlmeans is connected to said tensometer through a pulley which drives thebelt control means and the spindle.

3. The flyer spindle as claimed in claim 1 wherein the spindle of thesecond bearing means comprises means for adjusting the distance betweenspool contacting end thereof and the spindle of the first bearing means.

4. The fiyer spindle as claimed in claim 1 wherein said end bowls arerotated to impart a double twist to the thread.

References Cited UNITED STATES PATENTS 81,753 9/1868 Clark 57-5834407,522 7/1889 Furst 5758.34 697,437 4/1902 Boone 5758.36 2,567,3299/1951 Frazier 5758.34 UX 3,142,952 8/1964 Krafft et al. 57-58323,349,553 10/1967 Hood 57--58.7

20 JOHN PETRAKES, Primary Examiner US. Cl. X.R. 5758.32

